我正在尝试运行我从官方linux-omap GIT获得的最新linux-omap内核Linux-4.3.0-rc5-12674-g80923cf8e。
我用multi_v7_defconfig编译了它，禁用了不需要的板并添加了一些调试选项，如 earlyprintk。
我现在陷入内核恐慌，找不到问题所在。
该板是IGEPv2，我正在使用omap3-igep0020.dts设备树文件。
内核使用最新的 u-boot 加载，如果有帮助的话。
这是引导日志。知道吗？
## Booting kernel from Legacy Image at 80008000 ...
Image Name: Linux-4.3.0-rc5-12674-g80923cf8e
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 4945528 Bytes = 4.7 MiB
Load Address: 80008000
Entry Point: 80008000
Verifying Checksum ... OK
## Flattened Device Tree blob at 81f00000
Booting using the fdt blob at 0x81f00000
Loading Kernel Image ... OK
Loading Device Tree to 8ffec000, end 8ffff0a2 ... OK
Starting kernel ...
[ 0.000000] Booting Linux on physical CPU 0x0
[ 0.000000] Linux version 4.3.0-rc5-12674-g80923cf8eb3b (b@b43) (gcc version 7.2.0 (Ubuntu/Linaro 7.2.0-6ubuntu1) ) #2 SMP Wed Feb 28 00:49:54 EST 2018
[ 0.000000] CPU: ARMv7 Processor [411fc083] revision 3 (ARMv7), cr=10c5387d
[ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT nonaliasing instruction cache
[ 0.000000] Machine model: IGEPv2 Rev. C (TI OMAP AM/DM37x)
[ 0.000000] bootconsole [earlycon0] enabled
[ 0.000000] cma: Reserved 64 MiB at 0x9b800000
[ 0.000000] Memory policy: Data cache writeback
[ 0.000000] On node 0 totalpages: 130816
[ 0.000000] free_area_init_node: node 0, pgdat c09aee00, node_mem_map dfad9000
[ 0.000000] Normal zone: 1024 pages used for memmap
[ 0.000000] Normal zone: 0 pages reserved
[ 0.000000] Normal zone: 130816 pages, LIFO batch:31
[ 0.000000] CPU: All CPU(s) started in SVC mode.
[ 0.000000] OMAP3430/3530 ES3.1 (l2cache iva sgx neon isp )
[ 0.000000] PERCPU: Embedded 12 pages/cpu @dfa86000 s18572 r8192 d22388 u49152
[ 0.000000] pcpu-alloc: s18572 r8192 d22388 u49152 alloc=12*4096
[ 0.000000] pcpu-alloc: [0] 0
[ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 129792
[ 0.000000] Kernel command line: mem=512M console=ttyO2,115200n8 debug earlyprintk omapfb.mode=dvi:1024x768MR-16@60 root=/dev/mmcblk0p2 rw rootwait
[ 0.000000] PID hash table entries: 2048 (order: 1, 8192 bytes)
[ 0.000000] Dentry cache hash table entries: 65536 (order: 6, 262144 bytes)
[ 0.000000] Inode-cache hash table entries: 32768 (order: 5, 131072 bytes)
[ 0.000000] Memory: 442476K/523264K available (6856K kernel code, 370K rwdata, 2264K rodata, 396K init, 295K bss, 15252K reserved, 65536K cma-reserved, 0K highmem)
[ 0.000000] Virtual kernel memory layout:
[ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB)
[ 0.000000] fixmap : 0xffc00000 - 0xfff00000 (3072 kB)
[ 0.000000] vmalloc : 0xe0800000 - 0xff000000 ( 488 MB)
[ 0.000000] lowmem : 0xc0000000 - 0xe0000000 ( 512 MB)
[ 0.000000] pkmap : 0xbfe00000 - 0xc0000000 ( 2 MB)
[ 0.000000] modules : 0xbf000000 - 0xbfe00000 ( 14 MB)
[ 0.000000] .text : 0xc0008000 - 0xc08f0590 (9122 kB)
[ 0.000000] .init : 0xc08f1000 - 0xc0954000 ( 396 kB)
[ 0.000000] .data : 0xc0954000 - 0xc09b0980 ( 371 kB)
[ 0.000000] .bss : 0xc09b3000 - 0xc09fcc0c ( 296 kB)
[ 0.000000] SLUB: HWalign=64, Order=0-3, MinObjects=0, CPUs=1, Nodes=1
[ 0.000000] Hierarchical RCU implementation.
[ 0.000000] ⇥ Build-time adjustment of leaf fanout to 32.
[ 0.000000] ⇥ RCU restricting CPUs from NR_CPUS=16 to nr_cpu_ids=1.
[ 0.000000] RCU: Adjusting geometry for rcu_fanout_leaf=32, nr_cpu_ids=1
[ 0.000000] NR_IRQS:16 nr_irqs:16 16
[ 0.000000] IRQ: Found an INTC at 0xfa200000 (revision 4.0) with 96 interrupts
[ 0.000000] Clocking rate (Crystal/Core/MPU): 26.0/332/600 MHz
[ 0.000000] OMAP clockevent source: timer1 at 32768 Hz
[ 0.000000] clocksource: 32k_counter: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 58327039986419 ns
[ 0.000000] sched_clock: 32 bits at 32kHz, resolution 30517ns, wraps every 65535999984741ns
[ 0.008697] OMAP clocksource: 32k_counter at 32768 Hz
[ 0.014770] Console: colour dummy device 80x30
[ 0.019439] Calibrating delay loop... 597.60 BogoMIPS (lpj=2988032)
[ 0.084869] pid_max: default: 32768 minimum: 301
[ 0.089874] Mount-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.096801] Mountpoint-cache hash table entries: 1024 (order: 0, 4096 bytes)
[ 0.105255] CPU: Testing write buffer coherency: ok
[ 0.110809] CPU0: thread -1, cpu 0, socket -1, mpidr 0
[ 0.116394] Setting up static identity map for 0x80008340 - 0x80008398
[ 0.124786] Brought up 1 CPUs
[ 0.127929] SMP: Total of 1 processors activated (597.60 BogoMIPS).
[ 0.134521] CPU: All CPU(s) started in SVC mode.
[ 0.141571] devtmpfs: initialized
[ 0.190948] VFP support v0.3: implementor 41 architecture 3 part 30 variant c rev 1
[ 0.221343] omap_hwmod: mcbsp2_sidetone using broken dt data from mcbsp
[ 0.229003] omap_hwmod: mcbsp3_sidetone using broken dt data from mcbsp
[ 0.296447] clocksource: jiffies: mask: 0xffffffff max_cycles: 0xffffffff, max_idle_ns: 19112604462750000 ns
[ 0.311370] pinctrl core: initialized pinctrl subsystem
[ 0.319793] NET: Registered protocol family 16
[ 0.328643] DMA: preallocated 256 KiB pool for atomic coherent allocations
[ 0.338317] cpuidle: using governor ladder
[ 0.342712] cpuidle: using governor menu
[ 0.347473] Reprogramming SDRC clock to 332000000 Hz
[ 0.360107] OMAP GPIO hardware version 2.5
[ 0.385833] omap-gpmc 6e000000.gpmc: GPMC revision 5.0
[ 0.391235] gpmc_mem_init: disabling cs 0 mapped at 0x0-0x1000000
[ 0.400299] platform 49042000.serial: Cannot lookup hwmod 'uart4'
[ 0.412506] No ATAGs?
[ 0.414703] hw-breakpoint: debug architecture 0x4 unsupported.
[ 0.422790] OMAP DMA hardware revision 4.0
[ 0.427307] Serial: AMBA PL011 UART driver
[ 0.458862] omap-dma-engine 48056000.dma-controller: OMAP DMA engine driver
[ 0.474639] vgaarb: loaded
[ 0.478942] SCSI subsystem initialized
[ 0.483337] libata version 3.00 loaded.
[ 0.488037] usbcore: registered new interface driver usbfs
[ 0.493957] usbcore: registered new interface driver hub
[ 0.499603] usbcore: registered new device driver usb
[ 0.506896] omap_i2c 48070000.i2c: could not find pctldev for node /ocp/l4@48000000/scm@2000/pinmux@30/pinmux_i2c1_pins, deferring probe
[ 0.520629] omap_i2c 48072000.i2c: bus 1 rev3.3 at 100 kHz
[ 0.526519] omap_i2c 48060000.i2c: could not find pctldev for node /ocp/l4@48000000/scm@2000/pinmux@30/pinmux_i2c3_pins, deferring probe
[ 0.539611] pps_core: LinuxPPS API ver. 1 registered
[ 0.544860] pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
[ 0.554412] PTP clock support registered
[ 0.558990] EDAC MC: Ver: 3.0.0
[ 0.565734] clocksource: Switched to clocksource 32k_counter
[ 0.593200] NET: Registered protocol family 2
[ 0.598846] TCP established hash table entries: 4096 (order: 2, 16384 bytes)
[ 0.606323] TCP bind hash table entries: 4096 (order: 3, 32768 bytes)
[ 0.613128] TCP: Hash tables configured (established 4096 bind 4096)
[ 0.619903] UDP hash table entries: 256 (order: 1, 8192 bytes)
[ 0.626068] UDP-Lite hash table entries: 256 (order: 1, 8192 bytes)
[ 0.632873] NET: Registered protocol family 1
[ 0.638061] RPC: Registered named UNIX socket transport module.
[ 0.644226] RPC: Registered udp transport module.
[ 0.649230] RPC: Registered tcp transport module.
[ 0.654144] RPC: Registered tcp NFSv4.1 backchannel transport module.
[ 0.660919] PCI: CLS 0 bytes, default 64
[ 0.668243] hw perfevents: enabled with armv7_cortex_a8 PMU driver, 5 counters available
[ 0.680969] futex hash table entries: 256 (order: 2, 16384 bytes)
[ 0.707794] squashfs: version 4.0 (2009/01/31) Phillip Lougher
[ 0.715759] NFS: Registering the id_resolver key type
[ 0.721191] Key type id_resolver registered
[ 0.725585] Key type id_legacy registered
[ 0.729949] ntfs: driver 2.1.32 [Flags: R/O].
[ 0.735290] jffs2: version 2.2. (NAND) <0xc2><0xa9> 2001-2006 Red Hat, Inc.
[ 0.743438] fuse init (API version 7.23)
[ 0.750671] Block layer SCSI generic (bsg) driver version 0.4 loaded (major 249)
[ 0.758483] io scheduler noop registered
[ 0.762634] io scheduler deadline registered
[ 0.767242] io scheduler cfq registered (default)
[ 0.776153] pinctrl-single 48002030.pinmux: 284 pins at pa fa002030 size 568
[ 0.783874] pinctrl-single 48002a00.pinmux: 46 pins at pa fa002a00 size 92
[ 0.791748] Unhandled fault: external abort on non-linefetch (0x1028) at 0xfa0025a0
[ 0.799713] pgd = c0004000
[ 0.802581] [fa0025a0] *pgd=48011452(bad)
[ 0.806823] Internal error: : 1028 [#1] SMP ARM
[ 0.811553] Modules linked in:
[ 0.814819] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.3.0-rc5-12674-g80923cf8eb3b #2
[ 0.823028] Hardware name: Generic OMAP36xx (Flattened Device Tree)
[ 0.829589] task: db074000 ti: db078000 task.ti: db078000
[ 0.835235] PC is at pcs_readw+0x0/0x10
[ 0.839294] LR is at pcs_probe+0x388/0x804
[ 0.843597] pc : [<c02be958>] lr : [<c02c0700>] psr: 20000153
[ 0.843597] sp : db079de0 ip : 00000000 fp : 0000002e
[ 0.855560] r10: 00000000 r9 : 00000002 r8 : 00000000
[ 0.861053] r7 : 00000001 r6 : 00000000 r5 : 00000002 r4 : db2d4e10
[ 0.867828] r3 : c02be958 r2 : db21fc00 r1 : 00000002 r0 : fa0025a0
[ 0.874664] Flags: nzCv IRQs on FIQs off Mode SVC_32 ISA ARM Segment none
[ 0.882171] Control: 10c5387d Table: 80004019 DAC: 00000051
[ 0.888183] Process swapper/0 (pid: 1, stack limit = 0xdb078218)
[ 0.894439] Stack: (0xdb079de0 to 0xdb07a000)
[ 0.899017] 9de0: c0824d64 dfac90a0 c0974cd8 00000000 00000002 dfac90a0 0000000c c0824fcc
[ 0.907531] 9e00: db2d4ea8 00000000 db161c00 00000000 db2d4e40 db2d4e28 db2da9b0 db2da9b0
[ 0.916046] 9e20: c09b082f c0156d78 db2da9b0 00000000 00000000 c08302ec 00000001 c0156f34
[ 0.924560] 9e40: db163cd0 c08302ec 00000001 000000ec db163cd0 db2da7d0 db2da9b0 db163cd0
[ 0.933074] 9e60: c08302ec db161c10 ffffffed c0974cd8 fffffdfb 00000000 000000ec c094d048
[ 0.941589] 9e80: 00000000 c038b544 c09ec6ec db161c10 c0974cd8 00000000 00000000 c0389e2c
[ 0.950103] 9ea0: db161c10 c0974cd8 db161c44 00000000 00000000 c0389f9c 00000000 c0974cd8
[ 0.958587] 9ec0: c0389f18 c03882d0 db00cb5c db162434 c0974cd8 db2d9780 c0987578 c038940c
[ 0.967102] 9ee0: c0824d64 c09b3000 c0974cd8 c0974cd8 c0959bb0 db2db240 c0912288 c038a68c
[ 0.975616] 9f00: c0959bb0 c0959bb0 db2db240 c000985c 00000000 c014e320 c014ddd8 db11ab80
[ 0.984130] 9f20: 00000000 c096a858 00000000 c06aad30 dfeff132 c00504d0 cccccccd c08bebb8
[ 0.992645] 9f40: c085f958 00000006 00000006 c07f9410 c096a840 c09b3000 c09b3000 c0939830
[ 1.001159] 9f60: c09b3000 c09b3000 c0939834 c093983c 00000007 c08f1dc0 00000006 00000006
[ 1.009674] 9f80: 00000000 c08f159c 00000000 c0683b30 00000000 00000000 00000000 00000000
[ 1.018188] 9fa0: 00000000 c0683b38 00000000 c000f638 00000000 00000000 00000000 00000000
[ 1.026702] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[ 1.035186] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 fdfeffff f7ff777f
[ 1.043731] [<c02be958>] (pcs_readw) from [<c02c0700>] (pcs_probe+0x388/0x804)
[ 1.051269] [<c02c0700>] (pcs_probe) from [<c038b544>] (platform_drv_probe+0x48/0xa0)
[ 1.059417] [<c038b544>] (platform_drv_probe) from [<c0389e2c>] (driver_probe_device+0x1ec/0x2d8)
[ 1.068664] [<c0389e2c>] (driver_probe_device) from [<c0389f9c>] (__driver_attach+0x84/0x88)
[ 1.077423] [<c0389f9c>] (__driver_attach) from [<c03882d0>] (bus_for_each_dev+0x4c/0x9c)
[ 1.085937] [<c03882d0>] (bus_for_each_dev) from [<c038940c>] (bus_add_driver+0x18c/0x210)
[ 1.094543] [<c038940c>] (bus_add_driver) from [<c038a68c>] (driver_register+0x78/0xf4)
[ 1.102874] [<c038a68c>] (driver_register) from [<c000985c>] (do_one_initcall+0x8c/0x1d8)
[ 1.111389] [<c000985c>] (do_one_initcall) from [<c08f1dc0>] (kernel_init_freeable+0x158/0x1e8)
[ 1.120452] [<c08f1dc0>] (kernel_init_freeable) from [<c0683b38>] (kernel_init+0x8/0xe8)
[ 1.128875] [<c0683b38>] (kernel_init) from [<c000f638>] (ret_from_fork+0x14/0x3c)
[ 1.136779] Code: e5d00000 e6ef0070 f57ff04f e12fff1e (e1d000b0)
[ 1.143157] ---[ end trace 51c6d6f40dd2a6d2 ]---
[ 1.148040] In-band Error seen by MPU at address 0
[ 1.153167] ------------[ cut here ]------------
[ 1.158020] WARNING: CPU: 0 PID: 1 at drivers/bus/omap_l3_smx.c:166 omap3_l3_app_irq+0xc4/0x118()
[ 1.167236] Modules linked in:
[ 1.170471] CPU: 0 PID: 1 Comm: swapper/0 Tainted: G D 4.3.0-rc5-12674-g80923cf8eb3b #2
[ 1.179962] Hardware name: Generic OMAP36xx (Flattened Device Tree)
[ 1.186523] [<c00174f0>] (unwind_backtrace) from [<c0012ff4>] (show_stack+0x10/0x14)
[ 1.194580] [<c0012ff4>] (show_stack) from [<c028eea8>] (dump_stack+0x80/0x90)
[ 1.202117] [<c028eea8>] (dump_stack) from [<c00365f0>] (warn_slowpath_common+0x80/0xb0)
[ 1.210540] [<c00365f0>] (warn_slowpath_common) from [<c00366bc>] (warn_slowpath_null+0x1c/0x24)
[ 1.219665] [<c00366bc>] (warn_slowpath_null) from [<c02b5ec0>] (omap3_l3_app_irq+0xc4/0x118)
[ 1.228546] [<c02b5ec0>] (omap3_l3_app_irq) from [<c00787e0>] (handle_irq_event_percpu+0x48/0x138)
[ 1.237884] [<c00787e0>] (handle_irq_event_percpu) from [<c0078918>] (handle_irq_event+0x48/0x6c)
[ 1.247100] [<c0078918>] (handle_irq_event) from [<c007b584>] (handle_level_irq+0xac/0x144)
[ 1.255798] [<c007b584>] (handle_level_irq) from [<c0077f24>] (generic_handle_irq+0x24/0x34)
[ 1.264587] [<c0077f24>] (generic_handle_irq) from [<c00781b0>] (__handle_domain_irq+0x5c/0xb4)
[ 1.273620] [<c00781b0>] (__handle_domain_irq) from [<c0013bd4>] (__irq_svc+0x54/0x70)
[ 1.281860] [<c0013bd4>] (__irq_svc) from [<c0038028>] (do_exit+0x3e0/0x988)
[ 1.289215] [<c0038028>] (do_exit) from [<c0013324>] (die+0x32c/0x330)
[ 1.296020] [<c0013324>] (die) from [<c0009380>] (do_DataAbort+0xb4/0xb8)
[ 1.303100] [<c0009380>] (do_DataAbort) from [<c0013b60>] (__dabt_svc+0x40/0x60)
[ 1.310821] Exception stack(0xdb079d90 to 0xdb079dd8)
[ 1.316101] 9d80: fa0025a0 00000002 db21fc00 c02be958
[ 1.324615] 9da0: db2d4e10 00000002 00000000 00000001 00000000 00000002 00000000 0000002e
[ 1.333129] 9dc0: 00000000 db079de0 c02c0700 c02be958 20000153 ffffffff
[ 1.340026] [<c0013b60>] (__dabt_svc) from [<c02be958>] (pcs_readw+0x0/0x10)
[ 1.347381] [<c02be958>] (pcs_readw) from [<c02c0700>] (pcs_probe+0x388/0x804)
[ 1.354888] [<c02c0700>] (pcs_probe) from [<c038b544>] (platform_drv_probe+0x48/0xa0)
[ 1.363067] [<c038b544>] (platform_drv_probe) from [<c0389e2c>] (driver_probe_device+0x1ec/0x2d8)
[ 1.372283] [<c0389e2c>] (driver_probe_device) from [<c0389f9c>] (__driver_attach+0x84/0x88)
[ 1.381072] [<c0389f9c>] (__driver_attach) from [<c03882d0>] (bus_for_each_dev+0x4c/0x9c)
[ 1.389587] [<c03882d0>] (bus_for_each_dev) from [<c038940c>] (bus_add_driver+0x18c/0x210)
[ 1.398193] [<c038940c>] (bus_add_driver) from [<c038a68c>] (driver_register+0x78/0xf4)
[ 1.406524] [<c038a68c>] (driver_register) from [<c000985c>] (do_one_initcall+0x8c/0x1d8)
[ 1.415039] [<c000985c>] (do_one_initcall) from [<c08f1dc0>] (kernel_init_freeable+0x158/0x1e8)
[ 1.424072] [<c08f1dc0>] (kernel_init_freeable) from [<c0683b38>] (kernel_init+0x8/0xe8)
[ 1.432495] [<c0683b38>] (kernel_init) from [<c000f638>] (ret_from_fork+0x14/0x3c)
[ 1.440368] ---[ end trace 51c6d6f40dd2a6d3 ]---
[ 1.445343] Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
[ 1.445343]
[ 1.454925] Rebooting in 300
我很困惑，因为似乎有几个堆栈跟踪。 此外，尽管在内核中编译了调试信息，但我无法获得更详细的堆栈跟踪(但我怀疑调试信息实际上并不存在，因为文件非常小)
制造商 ISEE 为该板支持的最后一个内核是 2.6.37，它非常旧。运行更新的内核似乎没有任何问题，但设备树文件可能已经很长时间没有更新了......我只是在寻找此错误可能来自何处的指针，我会尝试修复它。
谢谢！
我不知道pcs是什么，但看起来它从错误的内存区域读取。
[ 1.340026] [<c0013b60>] (__dabt_svc) from [<c02be958>] (pcs_readw+0x0/0x10)
[ 1.347381] [<c02be958>] (pcs_readw) from [<c02c0700>] (pcs_probe+0x388/0x804)
[ 1.354888] [<c02c0700>] (pcs_probe) from [<c038b544>] (platform_drv_probe+0x48/0xa0)
您获得页面错误的原因是 SVC(内核)模式下的数据中止。发生这种情况可能是因为：
物理- 地址下没有任何物理内存或 IO 空间，这是在 PCS 驱动程序的设备树中指定的。(可能使用的 DTB 与 SoC 不兼容)。
pcs_readw访问的内存根本没有映射(或使用错误的属性映射)。
要弄清楚，您需要检查pcs_readw访问的虚拟地址的映射位置。使用哪些物理地址。检查 soc 手册以确保此物理地址适合 soc 内存映射。
上面的亚历克斯钉住了它！ 我正在写一个答案，因为在此期间我也发现了问题。
基本上，我使用的主板IGEPv2以使用不同CPU的多个版本发布。显然，我有一个早期的(修订版RB1)，它使用OMAP3530 CPU，而最新的则使用DM3730 CPU。
因此，在 omap3-igep.dtsi 文件(在 dts 中使用)中，我将包含从 omap36xx.dtsi 更改为 omap34xx.dtsi 和 boom，它成功启动。
Wifi不应该工作(因为他们在修订版之间更改了 Wifi 和蓝牙控制器的 RESET 引脚的 GPIO)，但现在系统可以正常启动，所以只需跟踪版本之间的更改并相应地编辑 DTS 文件。
希望这对同一条船上的人有所帮助 - 不确定我是否能够将这些更改发送到上游，所以至少如果有人谷歌这个问题，他们会找到它！